import java.util.*;
public class E {
    public static void main(String []args){
        Scanner reader=new Scanner(System.in);
        double sum=0;
        int m=0;
        while (reader.hasNextDouble()){
            double x=reader.nextDouble();
            assert x<=100&&x>=0:"数据不合理";
            m=m+1;
            sum=sum+x;
        }
        System.out.printf("%d个数的和为%f\n",m,sum);
        System.out.printf("%d个数的平均值是%f\n",m,sum/m);
    }
}